• CVE-2023-52629

发布时间: 2024年5月17日

修改时间: 2024年10月31日

概要

In the Linux kernel, the following vulnerability has been resolved: sh: push-switch: Reorder cleanup operations to avoid use-after-free bug The original code puts flush_work() before timer_shutdown_sync() in switch_drv_remove(). Although we use flush_work() to stop the worker, it could be rescheduled in switch_timer(). As a result, a use-after-free bug can occur. The details are shown below: (cpu 0) | (cpu 1) switch_drv_remove() | flush_work() | ... | switch_timer // timer | schedule_work(&psw->work) timer_shutdown_sync() | ... | switch_work_handler // worker kfree(psw) // free | | psw->state = 0 // use This patch puts timer_shutdown_sync() before flush_work() to mitigate the bugs. As a result, the worker and timer will be stopped safely before the deallocate operations.

CVSS v3 指标

NVD openEuler
Confidentiality None
Attack Vector Local
CVSS评分 N/A 5.5
Attack Complexity Low
Privileges Required Low
Scope Unchanged
Integrity None
User Interaction None
Availability High

安全公告

公告名 概要 发布时间
KylinSec-SA-2024-4777 kernel security update 2025年2月17日
KylinSec-SA-2024-4953 kernel security update 2025年2月28日

影响产品

产品 状态
KY3.4-4A kernel Fixed
KY3.5.2 kernel Fixed
KY3.4-5 kernel Fixed
KY3.5.1 kernel Fixed